6216491773944 has 320 divisors, whose sum is σ = 18818442720000. Its totient is φ = 1910830072320.

The previous prime is 6216491773889. The next prime is 6216491773981. The reversal of 6216491773944 is 4493771946126.

6216491773944 is a `hidden beast` number, since 6 + 2 + 1 + 6 + 491 + 77 + 39 + 44 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 223608957 + ... + 223636755.

It is an arithmetic number, because the mean of its divisors is an integer number (58807633500).

Almost surely, 2^{6216491773944} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6216491773944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9409221360000).

6216491773944 is an abundant number, since it is smaller than the sum of its proper divisors (12601950946056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6216491773944 is a wasteful number, since it uses less digits than its factorization.

6216491773944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28320 (or 28307 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The spelling of 6216491773944 in words is "six trillion, two hundred sixteen billion, four hundred ninety-one million, seven hundred seventy-three thousand, nine hundred forty-four".